A sprinter accelerates at 7.5 m/s from rest in 2.0 s, what distance did she go? (15 m) Proof please

The sprinter traveled a distance of 7.5 m

Explanation:

Motion With Constant Acceleration

It's a type of motion in which the rate of change of the velocity of an object is constant.

The equation that rules the change of velocities is:

Where:

a   = acceleration

vo = initial speed

vf  = final speed

t    = time

The distance traveled by the object is given by:

Using the equation [1] we can solve for a:

The sprinter travels from rest (vo=0) to vf=7.5 m/s in t=2 s. Computing the acceleration:

Now calculate the distance:

The sprinter traveled a distance of 7.5 m

b) 10 minutes

girls stopped for 10 minutes.

where are the vectors ?